Alarm.



PATENTED JULY 28, -190s.

- uNiTi-.D s'rAtrEs PATENT onirica.

EDWARD rFEIrER, or COLUMBUS, o nio.

ALARM.

Columbus in the county of Franklin and State of Ohio, have invented certain new and usel Improvements in Alarms, of which the i i following is a specification.

M inventionrelates to the improvementv of a` arms andl the'obje'cts of myl invention are to provide improved means whereby the presence of escaping gas or water, or the presence ofen unnatural degree of heat in a room, will be indicated bythe ringing of a bell; to

'construct my improved device-in a simple and linexpensive forni and to produce certain Iim roveinents the details of construction of which will be pointed out hereinafter. These objietsi'I accomplish in the `manner illustratfdf' in the accompanying drawing, in

Whih1 Figure 1 is a view in perspective of my imwifj@proved alarm mechanism, and, Fig. 2 is a side i elevation of a portion of saidv mechanism, certainparts being omitted for nes in illustration.

Similar numerals refer to similar parts throughout the several views.

In carrying out my invention, I employ a suitable supporting base 1 therefor, which may be, as shown, in the nature of an oblon' board or platform". Upon this base toward one end thereof, which we will term the inner end, I sup ort a bracket 2 which comprises a transverse y arranged plate from the ends of the sake of clear- -which extend vvertically upward parallel arms v 2t.v In theupper portion of each of these bracket arms, form an opening such as is indicated at 3, the lower .portion of each of:A

sid openings being of V orm. Supported in these openingsare the end portions of. a horizontal bai' 4, said bar being of wedge sha e in cross section or being formed with a kn' e edge on its lower side, said knife edge bearing in the lower ends of the openings 3. At a point opposite and in front of the bracket 2, lI su port transversely upon said base 1 a metalic contact rod or bar 5, the downwardly bent ends of which are suitably attached `to said base. 6 represents a rod which extends at right angles with the bar 4 and contact rod 5, said rod lying u on the bar 4 and having downwardly exten ing -jaws 7 which enga e o posite sides of said bar. On the inner si e o the bracket 2, the rod 6 carries a weight body 8 which is adjustable longitudinally on said bar and which is adapted Patented July? 2s, 190e.

to be held at any desired point on the latter through the medium of a set screw 9. Between the bar 4 and the rod 5, the rod 6 passes through the sides of and is rigidly connected with'a boX or receptacle 10, while the :outer end of said rod 6 beyond said box is normall held slightly above and out of contact witli the rod 5. This position of the rod 6 is. attained by movin the weight 8 on said rod to a position whic will insure the balancing of said weight and saidbox 10 and insure the support of ther knife edge bar 4 in an u right position in the openings 3.. y

I ith one end of the rod 5, I connect asuitable electric wire binding post 11. i In front of the rod 5, I provide a transverse bracket 12 whichcorresponds in forni with the bracket 2 and which as prescribed for the latter, has upwardly extending end arms indicated at 12.l and openings 12b in 'said arms corres ending with the openings 3 of tlfi'je arms 2. .'llliese bracket vvarms 12 have 'extending through and supported in the openings thereof the ends of a ar 13, `which*corresponds in form with the bar 4 and which is crossed centrally by a rod 1 4 which is suitably secured to said bar.

inner portion which extends over the rod 5, as prescribed' for the outer end portion of the thereof is connected by a wire 21 with the bracket 12.

In utilizing my invention,. the box or receptacle 10 is designed to contain a desirable amount of suitable water absorbing material, suoli as wood, chlorid of lime, sponge or flany of the numerous welldrnown water or As will be obvious,

moisture absorbents. however, these absorbing materials might be omitted from the box and the box`itself sorbent.

The device which I have describedm'ay be suitably located or supported within the room of a building and in case there should This rod 14 carries on its forward or outer end a box orrecept'acle 15 and on its formed of a suitable water or `moisture abu rod 6, it cari'ies a longitudinal 'adjustable an electric bell 20, while the remaining post y 14 and a consequent contact of the latter` weight ofsaidb be an undue amount wenn in the room Where said device is contained, such as might occur through the breakage of a water pipe or other similar accident, it is obvious that the moisture laden atrr-.ospliere coming into contact with the absorber material contained in the box or receptacle 10, must result in such material taking un a certain arnount of the moisture from the'atmosphere and inal conseouent suiicient increase 1n the ox to de ress the outer end portion of the rod 6 unti the latter contacts with-the transverse contact rod '5. By this contact it is obvious that an electric circuit wiil be closed through the battery and bell heretofore described, causing a rin ing of the bell and indicatingthat undesira le conditions exist in the 'room in which the device is placed. y The box rece tacle 15 may be made to contain a materia of a porous nature which will readily absorb gas, the latter dis placing air which might have previously been contained in the pores of the material.

-It will thus be seen that in case ofthe formation of an undue amount .of gas in a room Where the device is used, the displacement of the air in and about the 'b ox 15 and its contents by the lighter'gas and the presence of ,gas above said box, will result in the latter -moving upward sufficiently tovcause a downward movement of the inner end' of the rod with the contact rod. 5,' thereby producing through the arrangement' of wires and lthe employment of the bell and battery hereto,- fore described, a ringing action of said bell and an indication that an undue amount of gas exists in the room where the device is located. Y

It will be understood from the foregoing description of the construction and operation' of my device, that the same may be produced in a comparatively sim le and inexpensive form and that it will elgectually operate to sound an alarm in case 'of the escape of gas or water in a room. It is also evident that when the device herein described is located at a comparatively high point 1n a room, an undue amount of heat in said room may re sult in the lighter heated atmosphere causing a suiiicient upward movement of the receiptacle 15, to produce the result heretofore scribed when gas is presentf What I claim, is: y

In adeviceof the character described, the combination with a pair of supports, of longitudinally extending rods pivotally supporter ispose from said supports, a transversely contact rod, a member adapted to be d6- pressed by air heavier than normal and suported from one of the longitudinally extending rods between its pivoted portion and the contact rod and a member located upon the other longitudinally. extending rod beyondv its pivotal point, 'a counterweight located upon said rod between its pivotal point and the contact rod, said -counterwe' ht beingadapted 'to elevate the vlast name member .when the air is lighter Vthan normal there being an electrical circuit between. th'e contact rod and each of the supporting members, and ari-.alarm in said circuit whereby when either lof the longitudinallyY extending rods contact with the transversely disposed contactrod, an .alarm will be sounded. A

In testimony whereof I aflix-/my signature in presence of two witnesses.

EDWARD ,.-PFEIFEa Witnesses L. CARL SroUoHToN, MARTIN WENDEL. 

